@Troy Peters I found BP through the FIRE (Financially Independent/Retire Early) world of mrmoneymustache.com, madfientist.com and the book Your Money or Your Life which has shaped the way I view money. These suggestions will probably come across as a little harsh, but here it goes.
Sell the cars and buy two reasonably priced cars in cash. I will never understand going $60k in debt on something that is guaranteed to depreciate.
If you're not already, start tracking your spending. Mint.com works great for this. Once you see exactly where your money is going each month, it's much easier to make changes.
It sounds like you'll be able to pay off the credit cards soon with the new project, awesome!
Next, save up at least 6 months of living expenses. This is your emergency fund which is especially necessary in your line of work where you get paid infrequently. You will feel much better knowing you can go six months no problem without getting paid at all. You will be able ride out rocky patches without wondering if you should sell the house. Don't touch this fund unless necessary, it's for emergencies only.
The more you trim your spending, the less you have to save for your emergency fund and the faster the fund grows. These are just example numbers, you can plug in your own. If you're spending $10k a month you will need an emergency fund of $60k. If you can save $1k/month it will take you 60 months to get to the point where you will feel comfortable. But, say you can trim your spending down to $6k/month. Now you have $4k/month plus the $1k/month (that you were saving in the $10k/month example) which gives you $5k/month going into your emergency fund. With a spending rate of $6k/month you only need an emergency fund of $36k. At a savings rate of $5/month you will have an adequate emergency fund in just over 7 months. Trimming you spending has a double effect: the total amount you need to save is less and your savings rate increases.
You're in a great position to set yourself and your family up for being debt free and able to go a few months before getting paid. Best of luck!